"If 2050 is the year that 400 years of racism ends in one fell, photogenic swoop, then sure, I can't wait. But forgive me if our collective crushes on Rashida Jones, Lolo Jones, and Norah Jones don't inspire hope. Beauty is a cultural value whose definition has changed dramatically over time. But science and society have a long history of justifying our shifting tastes when it comes to race. White supremacy has been bolstered through race-based compulsory sterilization, anti-miscegenation laws, and likening people of color to animals."

Of all the racist things people do, living out white privilege might be the most insidious. White privilege is not just the assumptions that get white people treated better by employers and loan officers. It’s also the mental architecture that permits white people to avoid thinking of themselves as “white” — even as whiteness is assumed as the norm, and everyone who lacks it as “other.” White privilege is most potent when it goes unconsidered.

It will be nearly impossible to avoid considering white privilege after reading “When I Was White: A Memoir.” Author Sarah Valentine is that rare person who has lived both with white privilege and without it, and her account is moving and analytically rigorous.

Literature has given us light-skinned blacks who “passed” as white, from famed critic Anatole Broyard to figures in the poetry of Pittsburgh-based poet Toi Derricotte. Ms. Valentine’s story is something else again. She was born in 1977, and grew up mostly in the North Hills, one of three children in a tightly knit Catholic family. Her parents were white, and so, therefore, was she — until she learned, at age 27, that her biological father, whom she never knew, was African American…